WO1999028245B1 - An apparatus for applying alternating anaerobic contact processing for the treatment of wastewater - Google Patents

An apparatus for applying alternating anaerobic contact processing for the treatment of wastewater

Info

Publication number
WO1999028245B1
WO1999028245B1 PCT/US1998/025179 US9825179W WO9928245B1 WO 1999028245 B1 WO1999028245 B1 WO 1999028245B1 US 9825179 W US9825179 W US 9825179W WO 9928245 B1 WO9928245 B1 WO 9928245B1
Authority
WO
WIPO (PCT)
Prior art keywords
enclosed
vessel
chamber
anaerobic
enclosed chamber
Prior art date
Application number
PCT/US1998/025179
Other languages
French (fr)
Other versions
WO1999028245A2 (en
WO1999028245A3 (en
Inventor
Leonard E Ripley
Original Assignee
Freese And Nichols Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Freese And Nichols Inc filed Critical Freese And Nichols Inc
Priority to AU16060/99A priority Critical patent/AU1606099A/en
Publication of WO1999028245A2 publication Critical patent/WO1999028245A2/en
Publication of WO1999028245A3 publication Critical patent/WO1999028245A3/en
Publication of WO1999028245B1 publication Critical patent/WO1999028245B1/en

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F3/00—Biological treatment of water, waste water, or sewage
    • C02F3/28—Anaerobic digestion processes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S210/00—Liquid purification or separation
    • Y10S210/902—Materials removed
    • Y10S210/903—Nitrogenous

Abstract

An alternating anaerobic contact system for treating wastewater through an apparatus including one enclosed vessel partitioned into two or more enclosed chambers wherein each chamber is flow connected to other chambers by conduits or an apparatus including two or more enclosed vessels wherein each vessel is flow connected to other vessels by conduits. Each apparatus comprises at least one conduit which allows for (1) an anaerobic liquor to flow between a pair of chambers or vessels and (2) for treated wastewater to be separated and collected from the anaerobic liquor. Each apparatus overcomes the degassification problems common to anaerobic contact processing by assuring that the partial pressures of each chamber or vessel remain consistent. Each apparatus, furthermore, performs the settling stage of anaerobic contact processing in either a separate chamber or vessel thereby eliminating the need for external tankage, pumps, and piping.

Claims

42AMENDED CLAIMS[received by the International Bureau on 23 September 1999 (23.09.99); original claims 1-42 amended (16 pages)]
1. An anaerobic wastewater treatment apparatus for treating wastewater feed, said apparatus comprising: a first enclosed vessel, said first enclosed vessel having an influent system and an effluent system, said influent system of said first enclosed vessel comprises means for introducing wastewater feed into said first enclosed vessel; a second enclosed vessel, said second enclosed vessel having an influent system and an effluent system, said influent system of said second enclosed vessel comprises means for introducing wastewater feed into said second enclosed vessel; a conduit, said conduit interconnecting said first enclosed vessel and said second enclosed vessel so that said conduit forms a continuous fluid communication between said first enclosed vessel and said second enclosed vessel thereby allowing a first fluid to flow between said first enclosed vessel and said second enclosed vessel at a flow rate similar to a rate at which a second fluid is introduced into one of said first and second enclosed vessels.
2. An apparatus according to claim 1 wherein at least one other enclosed vessel having an influent system and an effluent system is interconnected to said first enclosed vessel and said second enclosed vessel by additional conduits, thereby forming a communication amongst said enclosed vessels so that a first fluid can flow between any one of said enclosed vessels to another of said enclosed vessels at a flow rate similar to the rate at which a second fluid is introduced into said one of said enclosed vessels, said influent system of each respective one of said at least one other enclosed vessel comprises means for introducing wastewater feed into the respective other enclosed vessel.
3. An apparatus according to claim 1 wherein each one of said enclosed vessels contains anaerobic bacteria capable of degrading organic material.
4. An apparatus according to claim 1 wherein each one of said enclosed vessels contains a mixing system able to maintain anaerobic bacteria in suspension without causing said anaerobic bacteria to shear.
5. An apparatus according to claim 1 , which further comprises a gas discharge conduit flow connected to each of said first enclosed vessel and said second enclosed vessel for maintaining consistent gas pressures within and between said first enclosed vessel and said second enclosed vessel.
6. An apparatus according to claim 1, which further comprises a recycling system flow connected to said conduit, said recycling system providing for selective recycling of a liquid combination comprising mainly wastewater feed and anaerobic bacteria.
7. A process for treating a wastewater feed using an alternating anaerobic contact process comprising the steps of:
(a) contacting a first portion of said wastewater feed with anaerobic bacteria in a first enclosed vessel to form a first anaerobic liquor, said first enclosed vessel serving as a reacting vessel for the anaerobic bacteria to break down organic material existing in said first portion of said wastewater feed;
(b) passing a portion of said first anaerobic liquor from said first enclosed vessel to a second enclosed vessel said second enclosed vessel serving as a settling vessel; (c) permitting anaerobic bacteria of said portion of said first anaerobic liquor in said second enclosed vessel to settle towards a bottom of said second enclosed vessel and treated wastewater to flow from said second enclosed vessel; 44
(d) allowing anaerobic bacteria in a remaining portion of said first anaerobic liquor in said first enclosed vessel to settle towards the a bottom of said first enclosed vessel;
(e) contacting a second portion of said wastewater feed with anaerobic bacteria in said second enclosed vessel to form a second anaerobic liquor, said second enclosed vessel now serves serving as the reacting vessel for the anaerobic bacteria to break down organic material existing in said second portion of said wastewater feed;
(f) passing a portion of said second anaerobic liquor from said second enclosed vessel to said first enclosed vessel, said first enclosed vessel now serving as the settling vessel; (g) permitting anaerobic bacteria in said portion of said second anaerobic liquor in said first enclosed vessel to settle towards the bottom of said first enclosed vessel and treated wastewater to flow from said first enclosed vessel;
(h) allowing anaerobic bacteria in a remaining portion of said second anaerobic liquor in said second enclosed vessel to settle towards the bottom of said second enclosed vessel.
8. A process according to claim 7, in which steps (a)-(h) are repeated.
9. A process according to claim 7, in which at least one additional enclosed vessel is flow connected to said first enclosed vessel and said second enclosed vessel by additional conduits to form a communication amongst said enclosed vessels.
10. A process according to claim 7, in which said first anaerobic liquor is mixed in said first enclosed vessel before passing said portion of said first anaerobic liquor to said second enclosed vessel.
11. A process according to claim 7, in which said second anaerobic liquor is mixed in said second enclosed vessel before passing said portion of said second anaerobic liquor to said first enclosed vessel. 45
12. A process according to claim 7, in which gases within said first enclosed vessel and said second enclosed vessel simultaneously flow from said first enclosed vessel and said second enclosed vessel to maintain consistent internal gas pressures within and between said first enclosed vessel and said second enclosed vessel.
13. A process for treating a wastewater feed using an alternating anaerobic contact process comprising the steps of:
(a) contacting a first portion of said wastewater feed with anaerobic bacteria in a first enclosed chamber to form a first anaerobic liquor, said first enclosed chamber serving as a reacting chamber for anaerobic bacteria to break down organic material existing in said first portion of said wastewater feed;
(b) passing a portion of said first anaerobic liquor from said first enclosed chamber to a second enclosed chamber, said second enclosed chamber serving as a settling chamber; (c) permitting anaerobic bacteria in said portion of said first anaerobic liquor in said second enclosed chamber to settle towards a bottom of said second enclosed chamber and treated wastewater to flow from said second enclosed chamber;
(d) allowing anaerobic bacteria in a remaining portion of said first anaerobic liquor in said first enclosed chamber to settle towards a bottom of said first enclosed chamber;
46
(e) contacting a second portion of said wastewater feed with anaerobic bacteria in said second enclosed chamber to form a second anaerobic liquor, said second enclosed chamber now serving as the reacting chamber for anaerobic bacteria to break down organic material existing in said second portion of said wastewater feed;
(f) passing a portion of said second anaerobic liquor from said second enclosed chamber to said first enclosed chamber, said first enclosed chamber now serving as the settling chamber;
(g) permitting anaerobic bacteria in said portion of said second anaerobic liquor in said first enclosed chamber to settle towards the bottom of said first enclosed chamber and treated wastewater to flow from said first enclosed chamber;
(h) allowing anaerobic bacteria in a remaining portion of said second anaerobic liquor in said second enclosed chamber to settle towards the bottom of said second enclosed chamber.
14. A process according to claim 13, in which steps (a)-(h) are repeated.
15. A process according to claim 13, in which at least one additional enclosed chamber is flow connected to said first enclosed chamber and said second enclosed chamber by additional conduits to form a communication amongst said enclosed chambers.
16. A process according to claim 13, in which said first anaerobic liquor is mixed in said first enclosed chamber before passing said portion of said first anaerobic liquor to said second enclosed chamber.
17. A process according to claim 13, in which said second anaerobic liquor is mixed in said second enclosed chamber before passing said portion of said second anaerobic liquor to said first enclosed chamber. 47
18. A process according to claim 13, in which gases within said first enclosed chamber and said second enclosed chamber flow from said first enclosed chamber and said second enclosed chamber chambers so to maintain consistent internal gas pressures within and between said first enclosed chamber and said second enclosed chamber.
19. A process for treating a wastewater feed using an alternating anaerobic contact process comprising the steps of:
(a) flowing a first portion of said wastewater feed into a first enclosed vessel, said first enclosed vessel serving as a reacting vessel wherein said first portion of wastewater feed is mixed with anaerobic bacteria thereby forming a first anaerobic liquor, wherein anaerobic bacteria said first anaerobic liquor break down organic material existing in said first portion of said wastewater feed;
(b) passing a portion of said first anaerobic liquor from said first vessel to a second enclosed vessel, said second enclosed vessel serving as a settling vessel;
(c) permitting the anaerobic bacteria of said of said first anaerobic liquor in said second enclosed vessel to settle towards a bottom of the second enclosed vessel and treated wastewater to flow from said second enclosed vessel;
(d) stopping the flow of said first portion of said wastewater feed into said first enclosed vessel while also stopping the mixing within said first enclosed vessel for a time period until anaerobic bacteria in the first anaerobic liquor remaining within said first enclosed vessel settle to a bottom of said first enclosed vessel, thereby forming a supernatant layer in said first enclosed vessel; 48
(e) flowing a second portion of said wastewater feed into said second enclosed vessel, said second enclosed vessel now serving as the reacting vessel wherein said second portion of wastewater feed is mixed with anaerobic bacteria to form a second anaerobic liquor, wherein anaerobic bacteria in said second anaerobic liquor break down organic material existing in said second portion of said wastewater feed;
(f) passing a portion of said second anaerobic liquor from said second enclosed vessel to said first enclosed vessel, said first enclosed vessel now serving as a settling vessel;
(g) permitting anaerobic bacteria in said portion of said second anaerobic liquor to settle towards the bottom of said first enclosed vessel and treated wastewater to flow from said first enclosed vessel;
(h) stopping the flow of said second portion of said wastewater feed to be treated into said second enclosed vessel while also stopping the mixing within said second enclosed vessel for a time period until anaerobic bacteria in the second anaerobic liquor remaining within said second enclosed vessel settle to the bottom of said second enclosed vessel, thereby forming a supernatant layer in said second enclosed vessel.
20. A process according to claim 19, in which steps (a)-(h) are repeated.
49
21. A process according to claim 19, in which at least one additional enclosed vessel is flow connected to said first enclosed vessel and said second vessel by additional conduits to form a communication amongst said enclosed vessels.
22. A process according to claim 19, in which said wastewater feed to be treated is first introduced into an equalization vessel wherein said wastewater feed is mixed and exposed to chemical additives for initial assistance in the treatment process.
23. A process according to claim 19, in which gases within said first enclosed vessel and said second enclosed vessel flow from said first enclosed vessel and said second enclosed vessel to maintain consistent internal gas pressures within and between said first enclosed vessel and said second enclosed vessel.
24. A process for treating a wastewater feed using an alternating anaerobic contact process comprising the steps of:
(a) flowing a first portion of said wastewater feed into a first enclosed chamber, said first enclosed chamber serving as a reacting chamber wherein said first portion of wastewater feed is mixed with anaerobic bacteria thereby forming a first anaerobic liquor, wherein anaerobic bacteria in said first anaerobic liquor break down organic material existing in said first portion of said wastewater feed;
(b) passing a portion of said first anaerobic liquor from said first enclosed chamber to a second enclosed chamber, said second enclosed chamber serving as a settling chamber;
(c) permitting anaerobic bacteria in said portion of said first anaerobic liquor in said second enclosed chamber to settle towards a bottom of 50
said second enclosed chamber and treated wastewater to flow from said second enclosed chamber; (d) stopping the flow of said first portion of said wastewater feed into said first enclosed chamber while also stopping the mixing within said first enclosed chamber for a time period until anaerobic bacteria in the first anaerobic liquor remaining within said first enclosed chamber settle to a bottom of said first enclosed chamber, thereby forming a supernatant layer in said first enclosed chamber; (e) flowing a second portion of said wastewater feed to be treated into said second enclosed chamber, said second enclosed chamber now serving as the reacting chamber wherein said second portion of wastewater feed is mixed with anaerobic bacteria to form a second anaerobic liquor, wherein anaerobic bacteria in said second anaerobic liquor break down organic material existing in said second portion of said wastewater feed;
(f) passing a portion of said second anaerobic liquor from said second enclosed chamber to said first enclosed chamber, said first enclosed chamber now serving as a settling chamber;
(g) permitting anaerobic bacteria in said portion of said second anaerobic liquor to settle towards the bottom of said first enclosed chamber and treated wastewater to flow from said first enclosed chamber;
(h) stopping the flow of said second portion of said wastewater feed into said second enclosed chamber while also stopping the mixing within said second enclosed chamber for a time period until anaerobic bacteria in the second anaerobic liquor remaining within said second enclosed chamber settle to the bottom of said second enclosed chamber thereby forming a supernatant layer in said second enclosed chamber. 51
25. A process according to claim 24, in which at least one additional chamber is flow connected to said first enclosed chamber and said second enclosed chamber by additional conduits so to form a communication amongst each said chamber.
26. A process according to claim 24, in which steps (a)-(h) are repeated.
27. A process according to claim 24, in which said wastewater feed is first introduced into an equalization vessel wherein said wastewater is mixed and exposed to chemical additives for initial assistance in the treatment process.
28. A process according to claim 24, in which gases within said first enclosed chamber and said second enclosed chamber flow from said first enclosed chamber and said second enclosed chamber to maintain consistent internal gas pressures within and between said first enclosed chamber and said second enclosed chamber.
29. An anaerobic wastewater treatment apparatus for treating wastewater feed, said apparatus comprising: a first enclosed chamber, said first enclosed chamber having an influent system and an effluent system, said influent system comprises means for introducing wastewater feed into said first enclosed chamber; a second enclosed chamber, said second enclosed chamber having an influent system and an effluent system, said influent system comprises means for introducing wastewater feed into said second enclosed chamber; a conduit, said conduit interconnecting said first enclosed chamber and said second enclosed chamber wherein said conduit forms a continuous fluid communication between said first enclosed chamber and said second enclosed chamber thereby allowing a first fluid to flow between said first enclosed chamber and said second enclosed chamber at a flow rate similar to a rate at which a second fluid is introduced into one of said first and second enclosed chambers. 52
30. An apparatus in claim 29 wherein said first enclosed chamber and said second enclosed chamber are defined by an enclosed vessel.
31. An apparatus in claim 29 wherein said first enclosed chamber and said second enclosed chamber contain anaerobic bacteria capable of degrading organic material.
32. An apparatus in claim 29 wherein each said enclosed chamber contains a mixing system able to maintain anaerobic bacteria in suspension without causing said anaerobic bacteria to shear.
33. An apparatus according to claim 29, which further comprises a gas discharge conduit flow connected to said first enclosed chamber and said second enclosed chamber to maintain consistent gas pressures within and between said first enclosed chamber and said second enclosed chamber.
34. An apparatus in claim 29, which further comprises a recycling system that provides for the selective recycling of a liquid combination comprising mainly wastewater feed and anaerobic bacteria.
35. An apparatus according to claim 29, which further comprises at least one other enclosed chamber, said other enclosed chamber, having an influent system and an effluent system, is interconnected to said first enclosed chamber and said second enclosed chamber by additional conduits thereby forming a communication amongst said enclosed chambers so that a first fluid can flow between any one of said enclosed chambers to another of said enclosed chambers at a flow rate similar to a rate at which a second fluid is introduced into said one of said enclosed chambers. 53
36. An anaerobic wastewater treatment apparatus for treating wastewater feed, said apparatus comprising: a first enclosed vessel and a second enclosed vessel, said first enclosed vessel and said second enclosed vessel each has a top, a bottom and an interior region wherein said interior region of said first enclosed vessel and said second enclosed vessel can receive and contain a fluid; an influent piping system flow connected to said first enclosed vessel and said second enclosed vessel, said influent system comprises means for selectively introducing wastewater feed to said first enclosed vessel and to said second enclosed vessel; a conduit, said conduit interconnecting said first enclosed vessel and said second enclosed vessel, said conduit can include a transfer manifold residing within each of said first enclosed vessel and said second enclosed vessel, said conduit forms a continuous fluid communication between said first enclosed vessel and said second enclosed vessel thereby allowing a first fluid to flow between said first enclosed vessel and said second enclosed vessel at a flow rate similar to a rate a second fluid is introduced into one of said first and second enclosed vessels; an effluent piping system flow connected to said first enclosed vessel and said second enclosed vessel, said effluent piping system can have an effluent manifold residing at the top portion of said first enclosed vessel and said second enclosed vessel; a gas discharge conduit flow connected to said first enclosed vessel and said second enclosed vessel for maintaining consistent gas pressures within and between said first enclosed vessel and said second enclosed vessel.
37. An apparatus according to claim 36, which further comprises a recycling system that provides for a selective recycling of a liquid combination comprising mainly wastewater feed and anaerobic bacteria. 54
38. An anaerobic wastewater treatment apparatus for treating wastewater feed, said apparatus comprising: an enclosed vessel, said enclosed vessel having a first enclosed chamber and a second enclosed chamber wherein each said enclosed chamber has a top, a bottom and an interior region, said interior region can receive and contain a fluid; an influent piping system flow connected to said first enclosed chamber and said second enclosed chamber, said influent system comprises means for introducing wastewater feed into said first enclosed chamber and said second enclosed chamber; a conduit interconnecting said first enclosed chamber and said second enclosed chamber, said conduit can include a transfer manifold residing within each said enclosed chamber, said conduit forms a continuous fluid communication between said first enclosed chamber and said second enclosed chamber to allow a first fluid to flow between said first enclosed chamber and said second enclosed chamber at a flow rate similar to a rate at which a second fluid is introduced into one of said first and second enclosed chambers; an effluent piping system flow connected to said first enclosed chamber and said second enclosed chamber, said effluent piping system can have an effluent manifold at the top portion of said first enclosed chamber and said second enclosed chamber; a gas discharge conduit flow connected to said first enclosed chamber and said second enclosed chamber for maintaining consistent internal gas pressures within and between said first enclosed chamber and said second enclosed chamber.
39. An apparatus according to claim 38, which further comprises a recycling system that provides for selective recycling of a liquid composition comprising mainly wastewater feed and anaerobic bacteria. 55
40 An apparatus according to claim 38, in which at least one additional enclosed chamber is formed within said enclosed vessel and is flow connected to said first enclosed chamber and said second enclosed chamber by additional conduits, said conduits form a continuous fluid communication amongst said enclosed chambers thereby allowing a first fluid to flow between any one of said enclosed chambers to another at a flow rate similar to a rate at which a second fluid is introduced into said one of said enclosed chambers, said additional enclosed chamber having an influent piping system and an effluent piping system as described in claim 38
56
41. A process for treating a wastewater feed comprising the steps of: (a) contacting said wastewater feed with anaerobic bacteria in a first enclosed vessel to form an anaerobic liquor, said first enclosed vessel serving as a reacting vessel; (b) passing continuously a portion of said anaerobic liquor from said first enclosed vessel to a second enclosed vessel, said second enclosed vessel serving as a settling vessel;
(c) allowing any gas formed within said first enclosed vessel and said second enclosed vessel to bleed-off simultaneously with the contacting of said wastewater feed with anaerobic bacteria in said first enclosed vessel and the continuous passing of said portion of said anaerobic liquor from said first enclosed vessel to said second enclosed vessel to maintain consistent internal gas pressures within and between said first enclosed vessel and said second enclosed vessel; and
(d) permitting anaerobic bacteria of said anaerobic liquor in said second enclosed vessel to settle within said second enclosed vessel and treated wastewater to flow from said second enclosed vessel.
42. A process for treating a wastewater feed comprising the steps of: (a) contacting said wastewater feed with anaerobic bacteria in a first enclosed chamber to form an anaerobic liquor, said first enclosed chamber serving as a reacting chamber; (b) passing continuously a portion of said anaerobic liquor from said first enclosed chamber to a second enclosed chamber, said second enclosed chamber serving as a settling chamber;
(c) allowing any gas formed within said first enclosed chamber and said second enclosed chamber to bleed-off simultaneously to the contacting of said wastewater feed with anaerobic bacteria in said first enclosed chamber and the continuous passing of said portion of said anaerobic liquor from said first enclosed chamber to said second enclosed chamber to maintain consistent internal gas pressures within and between said first enclosed chamber and said second enclosed chamber; and 57
(d) permitting anaerobic bacteria of said anaerobic liquor within said second enclosed chamber to settle within said second enclosed chamber and treated wastewater to flow from said second enclosed chamber.
PCT/US1998/025179 1997-12-01 1998-11-24 An apparatus for applying alternating anaerobic contact processing for the treatment of wastewater WO1999028245A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU16060/99A AU1606099A (en) 1997-12-01 1998-11-24 An apparatus for applying alternating anaerobic contact processing for the treatment of wastewater

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US08/982,242 US6096214A (en) 1997-12-01 1997-12-01 Process for applying alternating anaerobic contact processing for the treatment of wastewater
US08/982,242 1997-12-01

Publications (3)

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WO1999028245A2 WO1999028245A2 (en) 1999-06-10
WO1999028245A3 WO1999028245A3 (en) 1999-09-10
WO1999028245B1 true WO1999028245B1 (en) 1999-11-11

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US (2) US6096214A (en)
AU (1) AU1606099A (en)
WO (1) WO1999028245A2 (en)

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Also Published As

Publication number Publication date
AU1606099A (en) 1999-06-16
US6096214A (en) 2000-08-01
US6383371B1 (en) 2002-05-07
WO1999028245A2 (en) 1999-06-10
WO1999028245A3 (en) 1999-09-10

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